[bold][i]Can't playback Nero created SVCD[/bold][/i]

Hi, I've created mpeg2 files from a DVD using DVDx and the files playback fine. Then using Nero, I created an SVCD using the mpeg2 file. After adding the file, analysis shows that the file is acceptable BUT somehow the added filesize have shrunk by almost 100MB!! After writing the CD, the movie just won't play with error messages indicating unsupported file format. Please help ... thanks in advance!